晋城天地王坡煤矿3204工作面透射槽波探测

晋城天地王坡煤矿3204工作面开采之前既进行了坑透探测,发现工作面内含有5个以上陷落柱,直径均较大。为了进一步准确探测3204工作面内陷落柱的位置及大小,对该工作面陷落柱集中区域采用了透射槽波探测。观测系统沿运输巷、回风巷和联络巷展开,共布设激发点26个,接收点153个。槽波振幅衰减系数CT成像直观的显示出4个陷落柱的位置及大小,经开挖探巷验证,除5#陷落柱误差较大外,其它3个误差均较小。晋城天地王坡煤矿探测实例表明,陷落柱对透射槽波的衰减作用明显,槽波振幅衰减系数CT成像结果能够直接反映陷落柱发育情况,且与实际具有较高的吻合度。

Coalface No.3204 Transmission Channel Wave Prospecting in Tiandi Wangpo Coalmine

The underground electromagnetic wave perradiation has been carried out before winning of coalface No.3204 in the Tiandi Wangpo coalmine, Jincheng, and found 5 more large-sized subsided columns in the face. In order to determine their position and size, the transmission channel wave prospecting has been used in a subsided column concentration region. Observation system is arranged along gangways, outtakes and crossheadings, totally 26 shot points and 153 receiving points. Channel wave amplitude attenuation coefficient CT imaging intuitively displayed position and size of 4 subsided columns. After prospecting opening verification, besides the subsided column No.5 has greater errors, other 3 only rather smaller errors. The case study has shown：subsided columns have obvious attenuation on transmission channel wave, the amplitude attenuation coefficient CT imaging can directly reflect subsided column development situation and higher matching rate with practical.